题意: 给出先序和中序,求后序. 思路: ①建树然后递归输出. //建树的 #include<iostream> #include<cstdio> #include<queue> #include<cstring> using namespace std; int n; ],mid[]; ]; struct node{ char c; node *left,*right; node() { c='a'; left=right=NULL; } }; ,coun…

传送门1: https://uva.onlinejudge.org/external/5/536.pdf 传送门2: http://acm.gdufe.edu.cn/Problem/read/id/1077 题意一样   输入不一样 HINT: 1. Preorder : (root, left subtree, right subtree); Inorder : (left subtree, root, right subtree); Postorder: (left subtree, rig…

Little Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital letters in the nodes. This is an example of one of her creations:                                               …

题意:给出一颗二叉树的前序遍历和中序遍历,输出其后序遍历 用杭电1710的代码改一点,就可以了. #include<iostream> #include<cstdio> #include<cstring> #include <cmath> #include<algorithm> using namespace std; typedef long long LL; ; char a[maxn],b[maxn],ans[maxn],s1[maxn],…

题意:已知先序中序,输出后序. #pragma comment(linker, "/STACK:102400000, 102400000") #include<cstdio> #include<cstring> #include<cstdlib> #include<cctype> #include<cmath> #include<iostream> #include<sstream> #include&…

题目 题目     分析 莫名A了     代码 #include <bits/stdc++.h> using namespace std; string s1,s2; void build(int l1,int r1,int l2,int r2) { int root=l1,p=l2; if(l1>r1) return; while(s2[p]!=s1[root] && p<=r2) p++; int cnt=p-l2; build(l1+1,l1+cnt,l2,…

UVa 699 The Falling Leaves(递归建树) 假设一棵二叉树也会落叶  而且叶子只会垂直下落   每个节点保存的值为那个节点上的叶子数   求所有叶子全部下落后   地面从左到右每堆有多少片叶子 和UVa 839 -- Not so Mobile(树的递归输入)有点像  都是递归输入的  一个节点(设水平位置为p)  则它的左右儿子节点的水平位置分别为  p-1  p+1   也是可以边输入边处理的  输入完也就得到答案了   注意每个样例后面都有一个空行  包括最后一个 #…

 Tree Recovery  Little Valentine liked playing with binary trees very much. Her favoritegame was constructingrandomly looking binary trees with capital letters in the nodes. This is an example of one of her creations: D / \ / \ B E / \ \ / \ \ A C G…

UVA.548 Tree(二叉树 DFS) 题意分析 给出一棵树的中序遍历和后序遍历,从所有叶子节点中找到一个使得其到根节点的权值最小.若有多个,输出叶子节点本身权值小的那个节点. 先递归建树,然后DFS求解. 代码总览 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <string> #include <sstre…

Tree Recovery Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11939   Accepted: 7493 Description Little Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital le…